(19)
(11) EP 0 306 241 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
19.09.1990 Bulletin 1990/38

(43) Date of publication A2:
08.03.1989 Bulletin 1989/10

(21) Application number: 88307960.0

(22) Date of filing: 26.08.1988
(51) International Patent Classification (IPC)4: A61M 1/16
(84) Designated Contracting States:
BE DE FR GB IT NL SE

(30) Priority: 01.09.1987 JP 218722/87
01.09.1987 JP 218723/87
30.04.1988 JP 108787/88

(71) Applicants:
  • SHIBUYA KOGYO CO., LTD
    Kanazawa-shi Ishikawa 920 (JP)
  • NISSHO CORPORATION
    Osaka-shi Osaka-fu (JP)
  • Era, Kazuo
    Tachikawa-Shi Tokyo (JP)

(72) Inventors:
  • Era, Kazuo
    Tachikawa-Shi Tokyo (JP)
  • Ueda, Mitsutaka
    Osaka-shi Osaka-fu (JP)
  • Sano, Yoshihiko
    Osaka-shi Osaka-fu (JP)
  • Takakuwa, Tateki c/o Shibuya Kogyo Co., Ltd
    Kanazawa-shi Ishikawa-ken (JP)
  • Fujikawa, Inobu c/o Shibuya Kogyo Co., Ltd.
    Kanazawa-shi Ishikawa-ken (JP)

(74) Representative: Harrison, David Christopher et al
MEWBURN ELLIS York House 23 Kingsway
London WC2B 6HP
London WC2B 6HP (GB)


(56) References cited: : 
   
     
    Remarks:
    A request for correction of an error on page 17, line 9, of the description has been filed pursuant to Rule 88 EPC. A decision on the request will be taken during the proceedings before the Examining Division (Guidelines for Examination in the EPO, A-V, 2.2).
     


    (54) Dialysis system


    (57) A dialysis system operates to supply dialysate to a dialyzer (1) from a feed chamber (13) in response to a reduction in the volume of the feed chamber, and to recover used dialysate which flows from the dialyzer (1) into a recovery chamber (15) in response to an increase in the volume of the recovery chamber. By interlock means, e.g. a controllably volume variable chamber (14) between diaphragms (11,12) defining the chambers (13,15) the increase in the volume of the recovery chamber is greater in magnitude than the magnitude of a reduction in the volume of the feed chamber, the difference between the rates being effective to control the amount of ultrafiltration. Two or more sets of feed chambers and recovery chambers may be provided, in which case supply of the dialysate from one feed chamber is preferably initiated before the supply from one of the other feed chambers is completed, thus allowing the dialysate to be continuously supplied to the dialyzer (1).







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